Reroofing Over Zip System Sheathing

Q: I’m stripping and reroofing asphalt shingles that were installed over Huber Zip System sheathing. Can I install the new roof directly over the sheathing, or do I have to do anything else? The seams were all secured with Zip tape originally.

— MIKE, via email

A: Tate Hudson, a product application specialist with Huber Engineered Woods, replies: When installing new shingles or roofing over existing Zip System sheathing, you first need to install an additional code-approved roofing underlayment due to the amount of nail holes left behind from the previous roof covering.

More about wall and roof sheathing:

• A Practical Air-Sealing Sequence
• Video: How to Install Wall Sheathing
• Video: Sheathing a Roof

Fine Homebuilding Recommended Products

Fine Homebuilding receives a commission for items purchased through links on this site, including Amazon Associates and other affiliate advertising programs.

Roofing Gun

This lightweight, pneumatic roofing nailer is capable of driving ¾-in to 1¾-in coil roofing nails and has a depth adjustment wheel to dial in nailing depth on the various shingle types you're likely to encounter.

Buy at Amazon

Ladder Stand Off

Stability is key when working off a ladder or accessing the roof, and this lightweight aluminum stand-off makes any extension ladder safer and more comfortable to use.

Buy at Amazon

Flashing Boot Repair

Prolonged exposure to the sun and weather can compromise the rubber gasket on standard vent flashing. Use this to quickly and permanently fix failed seals or to help protect the gasket in new-construction applications.

Buy at Amazon